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Höwenegg Quarry (Hewenegg Quarry), Immendingen, Hegau, Baden-Württemberg, Germany
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Photo: mk
Latitude: 47°54'36"N
Longitude: 8°44'50"E
 
Name(s) in local language(s): Steinbruch Höwenegg (Steinbruch Hewenegg), Immendingen, Hegau, Baden-Württemberg, Deutschland
 
A quarry in a Lower Tertiary nepheline-basalt, which was abandoned in 1979 and forms part of a protected area since 1983. Höwenegg mountain, where the quarry is situated, is also a very important locality for Tertiary fossil mammals. Collecting here is strictly prohibited.
Located about 3 km south of Immendingen.

This quarry is the type locality of Amicite, which was discovered by Otto Krumm in thin veins of the Melilite-Nephelinite-rock and provided for resarch. The first description was made by Alberti, Hentschel & Vezzalini in 1979 (see reference). Amicite is associated with Merlinoite, Calcite and Aragonite.

Mineral List

Amicite (TL)
Analcime
'Apophyllite'
Aragonite
Augite
'Biotite'
Calcite
Celadonite
'Chabazite'
Chalcopyrite
Epidote
Garronite
Gypsum
Harmotome
'Hornblende'
'Limonite'
Magnesite
Makatite
'Melilite'
Merlinoite
Mesolite
Montmorillonite
Mountainite
Natrolite
Nepheline
Offretite
'Olivine'
'Paulingite'
'Phillipsite'
Phlogopite
Scolecite
Spinel
'Stilbite'
Thomsonite-Ca
Tobermorite
Tridymite


36 entries listed. 26 valid minerals. 1 type locality (valid mineral).

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References

- Der Aufschluss 1981(4), 130-134
- Tschernich, R. (1992), Zeolites of the World, p.42
- Alberti A., Hentschel G. and VezzaliniG. (1979) Amicite, a new natural zeolite - N.Jb.Miner. Mh., Jg. 1979, H.11, 481-488

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Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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